PK is Donald Duck's comic-book superhero alter ego; the video game, like the comic book, focuses on PK's battle against the Evronians, an evil alien race bent on the invasion and eventual destruction of the planet Earth. Armed with highly sophisticated and futuristic gadgets such as the X-Transformer, Jet-pack, Iron Fist and Remote X-Transformer, and with the help of Computer One (the brains behind his equipment), PK blasts his way through enemy defences and finds the root of Earth's problems, an Evronian Battleship parked inside Earth's orbit. With all his might, PK will try and defeat the Evronians and send them back to the black hole where they originated.